Headset



1.1 is a perspective view of a headset showing the new design;

1.2 is a front view thereof;

1.3 is a right side view thereof;

1.4 is a left side view thereof;

1.5 is a top view thereof; and

1.6 is a bottom view thereof.

The broken lines in the drawings show portions of the headset that form no part of the claimed design. Shading lines illustrate the curvatures of the design and form no part of the claimed design. The back view of the design is omitted and forms no part of the claimed design. 

CLAIM The ornamental design for a headset, as shown as described. 